
var t = null;
t = setTimeout(time, 1000); //開始运行
function time() {
    clearTimeout(t); //清除定时器
    dt = new Date();
    var y = dt.getFullYear();
    var mt = dt.getMonth() + 1;
    var day = dt.getDate();
    var h = dt.getHours(); //获取时
    var m = dt.getMinutes(); //获取分
    var s = dt.getSeconds(); //获取秒
    document.querySelector(".showTime").innerHTML =
        "当前时间：" +
        y +
        "年" +
        mt +
        "月" +
        day +
        "-" +
        h +
        "时" +
        m +
        "分" +
        s +
        "秒";
    t = setTimeout(time, 1000); //设定定时器，循环运行
}